An atom has completely filled inner shells and a single valence electron in an excited p state. The filled inner shells have an orbital momentum equal to zero. What is the magnitude of the orbital angular momentum L of the atom

1

Explanation:

Lz=projection of L vector on the direction of the magnetic field  

l=-1: theta=135 deg  

l=0: theta=90 deg  

l=1: theta=45 deg

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explanation: